Cita APA (7th ed.)
Samuelson, P. A., & William D. Nordhaus. (2007). Economics (18 th ed.). Tata McGraw-Hill.
Cita Chicago (17th ed.)
Samuelson, Paul A., i William D. Nordhaus. Economics. 18 th ed. New Delhi: Tata McGraw-Hill, 2007.
Cita MLA (9th ed.)
Samuelson, Paul A., i William D. Nordhaus. Economics. 18 th ed. Tata McGraw-Hill, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.